231330311223220 has 48 divisors (see below), whose sum is σ = 532174105209600. Its totient is φ = 83768146152320.

The previous prime is 231330311223191. The next prime is 231330311223251. The reversal of 231330311223220 is 22322113033132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2199741175 + ... + 2199846334.

It is an arithmetic number, because the mean of its divisors is an integer number (11086960525200).

Almost surely, 2^{231330311223220} is an apocalyptic number.

231330311223220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231330311223220 is an abundant number, since it is smaller than the sum of its proper divisors (300843793986380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231330311223220 is a wasteful number, since it uses less digits than its factorization.

231330311223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399587768 (or 4399587766 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 231330311223220 its reverse (22322113033132), we get a palindrome (253652424256352).

The spelling of 231330311223220 in words is "two hundred thirty-one trillion, three hundred thirty billion, three hundred eleven million, two hundred twenty-three thousand, two hundred twenty".